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METHOD FOR GESTURE DETECTION, OPTICAL SENSOR CIRCUIT, IN PARTICULAR AN OPTICAL SENSOR CIRCUIT FOR GESTURE DETECTION, AND OPTICAL SENSOR ARRANGEMENT FOR GESTURE DETECTION

  • US 20160070358A1
  • Filed: 04/04/2014
  • Published: 03/10/2016
  • Est. Priority Date: 04/09/2013
  • Status: Active Grant
First Claim
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1. A method for gesture detection comprising pre-processing and main-processing steps, wherein the pre-processing comprises:

  • emitting light in a pulsed manner with pulse-on phases followed by pulse-off phases using a light emitting device,generating ambient signals depending on ambient light incident on a directional light sensor array during pulse-off phases of the emitted light,generating light signals as a function of time by detecting a fraction of the emitted light reflected by means of a movable object during pulse-on phases of the emitted light using the directional light sensor array, andcalculating directional sensor signals as a function of time by adjusting the light signals with the ambient signals, andwherein the main-processing comprises;

    calculating coordinates as a function of time by using the directional sensor signals, being indicative of a position of the object with reference to a plane parallel to a principal plane of the light sensor array, anddetecting a movement of the object depending on the timing of the coordinates.

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